Sources close to the fight confirmed the bout with MMAjunkie.com (www.mmajunkie.com).

However, as of Monday morning, UFC officials hadn’t formally announced the matchup.

UFC on FX 1 takes place Friday at Bridgestone Arena in Nashville, Tenn. The main card airs on FX, and the prelims, including Hayden vs. Camoes, air on FUEL TV.

Camoes initially was slated to fight Reza Madadi (11-2 MMA, 0-0 UFC), who pulled out of the event over the weekend due to an undisclosed injury.

Hayden, a four-year pro who’s fought at featherweight, is 8-0 with eight stoppage victories in a smattering of regional shows. Five of the wins have come via submission, two via knockout and one via disqualification. While he’s fought primarily against similarly experienced opponents, he does own a 2009 submission win over veteran fighter and “The Ultimate Fighter 14″ cast member Dustin Neace.

Hayden was part of “The Ultimate Fighter 9″ but lost an elimination-round matchup to Cameron Dollar.

Camoes, himself d a replacement for Reza Madadi), returns to the octagon after a decision victory over “The Ultimate Fighter 8″ winner Efrain Escudero in May at Tachi Palace Fights 9. It was his second consecutive victory after a decision loss to Kurt Pellegrino at UFC 111 that prompted his exit from the octagon. The 33-year-old submission specialist underwhelmed in his UFC debut and fought Japanese veteran Caol Uno to a majority draw at UFC 106.